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//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
// UNSUPPORTED: c++03, c++11, c++14, c++17, c++20
// constexpr const T* operator->() const noexcept;
// constexpr T* operator->() noexcept;
#include <cassert>
#include <concepts>
#include <expected>
#include <type_traits>
#include <utility>
#include "test_macros.h"
// Test noexcept
template <class T>
concept ArrowNoexcept =
requires(T t) {
{ t.operator->() } noexcept;
};
static_assert(!ArrowNoexcept<int>);
static_assert(ArrowNoexcept<std::expected<int, int>>);
static_assert(ArrowNoexcept<const std::expected<int, int>>);
constexpr bool test() {
// const
{
const std::expected<int, int> e(5);
std::same_as<const int*> decltype(auto) x = e.operator->();
assert(x == &(e.value()));
assert(*x == 5);
}
// non-const
{
std::expected<int, int> e(5);
std::same_as<int*> decltype(auto) x = e.operator->();
assert(x == &(e.value()));
assert(*x == 5);
}
return true;
}
int main(int, char**) {
test();
static_assert(test());
return 0;
}
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